Thank you for contacting Mearto with your appraisal inquiry. Based on the photographs and description provided, the subject of this appraisal is a Mint Grading authenticated Lebron James 2003-04 Upper Deck Top Prospects #P3 basketball card, graded Gem Mint 10.

According to the current owner, the piece was acquired via inheritance.

Mint Grading is a defunct authenticator, and unfortunately a grade from Mint Grading does not carry the same value as a similar grade from PSA or BGS. Arguably an equivalent grader would be a BCCG 10 or possibly a PSA 9.

On December 7, a BCCG Lebron James 2003-04 Upper Deck Top Prospects #P3, graded Gem Mint 10, sold via eBay for $49.99. Cards graded PSA 9 routinely sell in the $20 to $30 range.

In consideration of the factors noted, a Fair Market Value (pre-auction estimate) of this piece would be estimated at $25 to $50.